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什么是電力電子變換器,電力電子變換器是什么?

發表時間:2021-02-26 17:19【 閱讀量:-查看手機網址
掃一掃!什么是電力電子變換器,電力電子變換器是什么?掃一掃!

  什么是電力電子變換器?


  電力電子變換共有4種基本類型。分別是整流、逆變、斬波和周波變內換。其中整流是將交流電變換容成直流電(大小固定或可調的直流電);逆變是將直流電變換成交流電;斬波是將電壓大小固定的直流電變換成另一種電壓的直流電;而周波變換是指將一種頻率的交流電變換成另一種頻率的交流電(即交-交變頻),或是將固定大小電壓(或功率)的交流電變換成另一種電壓(或功率)的交流電(即交流調壓和交流調功)。


  電力電子變換器的優缺點:


  優點:增大開關頻率可以降低對濾波元件的需求,減小體積,降低無源器件和機柜成本。缺點:但開關頻率越大容,開關損耗越大,效率越低,散熱設計會變的復雜。同時,半導體開關器件的選擇也更為苛刻。電磁兼容問題也會更加突出至于如何克服這些缺點,如果很簡單能說清楚的話,就不會有這么多人做研究了。簡單的說有幾種把:軟開關技術,但是會增加系統復雜性,降低可靠性,增加成本拓撲改進,同樣會增加系統復雜性,增加成本采用SiC或者GaN器件。


此文關鍵字:電力電子變換器
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